Calculate 62+31
If 87+92=18, 57+83=13, 12+61=4 then 62+31=?Correct answers: 118
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Vending machineIn 1884, the first U.S. patent was issued for an automatic liquid vending machine to William H. Fruen of Minneapolis, Minn. (No. 309,219). When a coin was inserted in a slot, a measured quantity of liquid was released from a reservoir. |